Twelvetrees, Walter Noble Structural Iron and Steel: A Text-Book for Architects, Engineers, Builders and Science Students Twelvetrees, Walter Noble Concrete Steel: A Treatise on the Theory and Practice of Reinforced Concrete Construction Twelvetrees, Walter Noble The Practical Design of Reinforced Concrete Beams and Columns Twelvetrees, Walter Noble Concrete and Reinforced Concrete Twelvetrees, Walter Noble Concrete and Reinforced Concrete